Enwrapping g-C3N4 on In2O3 hollow hexagonal tubular for photocatalytic CO2 conversion: Construction, characterization, and Z-scheme mechanism insight

被引:49
作者
Chen, Ruijie [1 ]
Yin, Haotian [1 ]
Wang, Lei [1 ]
Zhang, Zhiqiang [1 ]
Ding, Jing [1 ]
Zhang, Jinfeng [2 ]
Wan, Hui [1 ]
Guan, Guofeng [1 ]
机构
[1] Nanjing Tech Univ, Coll Chem Engn, Jiangsu Natl Synerget Innovat Ctr Adv Mat, State Key Lab Mat Oriented Chem Engn, Nanjing 210009, Peoples R China
[2] Huaibei Normal Univ, Key Lab Green & Precise Synthet Chem & Applicat, Minist Educ, Huaibei 235000, Peoples R China
基金
中国国家自然科学基金;
关键词
g-C3N4; In2O3; MOFs; Heterostructure; photocatalytic CO2 reduction; HYDROGEN-PRODUCTION; HETEROJUNCTION; REDUCTION; CATALYSTS; EFFICIENT; STRATEGY; WATER;
D O I
10.1016/j.jcis.2022.11.006
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The reduction of CO2 achieved by photocatalysis can simultaneously alleviate the energy crisis and solve environmental issues. Nevertheless, it remains challenging for the rational design of photocatalysts with high-efficiency carrier migration ability. Herein, the Z-scheme g-C3N4/In2O3 (CN/INO) heterostructure was fabricated via metal-organic frameworks (MOFs) assisted thermal deposition which could form a fully encapsulated hollow tubular structure. The unique structure was based on the MOFs-derived hollow hexagonal In2O3 tubular integrated with ultrathin g-C3N4. The Z-scheme CN/INO heterojunction exhibited a larger specific surface area and excellent charge separation efficiency. Benefiting from the above features, the Z-scheme CN/INO heterojunction demonstrated superior performance on photocatalytic CO2 reduction. The formation of CO and CH3OH over the optimized CN/INO-2 catalyst was 7.94 and 1.44 mu mol center dot g(-1)center dot h(-1), respectively. Moreover, the density functional theory (DFT) calculations and Kelvin probe force microscopy (KPFM) was carried out to further investigate the situation of charge transfer on the interface of CN/INO. The in-situ Fourier transform infrared spectroscopy (FTIR) was measured to confirm the immediate products and the possible mechanism of photocatalytic CO2 reduction was proposed. This work provided a MOFs-assisted strategy to construct a Z-scheme system for photocatalytic CO2 reduction. (c) 2022 Elsevier Inc. All rights reserved.
引用
收藏
页码:122 / 132
页数:11
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